 The Third Piano Concerto and the "Andante and Finale" are sometimes played together to form a synthetic "complete" concerto.What is known as the "Andante and Finale" had its genesis as the slow movement and finale of Tchaikovsky's Symphony in E-flat, a work he started writing in 1892.He abandoned the symphony in December 1892, but after his nephew Bob Davydov chided him, he began reworking it into a piano concerto, his third, which he promised to the French pianist Louis Diémer.